EP0565886B1 - Cheminée industrielle avec dispositif de protection contre l'acide - Google Patents

Cheminée industrielle avec dispositif de protection contre l'acide Download PDF

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Publication number
EP0565886B1
EP0565886B1 EP93104312A EP93104312A EP0565886B1 EP 0565886 B1 EP0565886 B1 EP 0565886B1 EP 93104312 A EP93104312 A EP 93104312A EP 93104312 A EP93104312 A EP 93104312A EP 0565886 B1 EP0565886 B1 EP 0565886B1
Authority
EP
European Patent Office
Prior art keywords
chimney
plates
industrial
protection device
air guidance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93104312A
Other languages
German (de)
English (en)
Other versions
EP0565886A1 (fr
Inventor
Wolfgang Dipl.-Phys. Kahlert
Matthias Dipl.-Ing. Eiden
Hans Prof. Ruscheweyh
Rainer Dipl.-Phys. Pfromm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flachglas Consult GmbH
Original Assignee
Flachglas Consult GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flachglas Consult GmbH filed Critical Flachglas Consult GmbH
Publication of EP0565886A1 publication Critical patent/EP0565886A1/fr
Application granted granted Critical
Publication of EP0565886B1 publication Critical patent/EP0565886B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J13/00—Fittings for chimneys or flues 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues

Definitions

  • the invention relates to an industrial chimney, the chimney mouth of which is arranged in a free-flow area above the ground, - with a chimney head, to which an acid protection device is attached, which is arranged at a distance from the chimney casing which forms an annular space, the acid protection device having a length in the chimney direction that is one Corresponds to several times the diameter of the chimney head.
  • - Industrial chimney in the context of the invention designates chimneys of great height.
  • Free flow area refers to an area of the atmospheric air space in which the air flow mainly follows the climatic potentials and is not influenced in terms of flow by structures close to the ground. The air flow that flows against such an industrial chimney creates a negative pressure on the leeward side for aerodynamic reasons.
  • Flue gases withdrawing from the chimney mouth are drawn onto the wall of the chimney head in the form of a smoke plume on the leeward side.
  • the flue gases are cooled below their dew point, so that aggressive substances such as sulfuric acid, sulfur compounds and the like can trigger severe corrosion.
  • practice speaks of a down-wash effect.
  • the acid protection device is designed as a nozzle casing which forms a closed nozzle casing around the chimney head in accordance with the annular space, the nozzle-shaped annular space thus formed at the bottom as well as in the area of the chimney mouth.
  • the nozzle jacket has a jacket length that corresponds to a multiple of the diameter of the chimney head. Aerodynamic acid protection is thus achieved, the effect of which is largely determined by Bernoulli's relationships in aerodynamics. That has proven itself.
  • the disturbing negative pressure causing the down-wash effect on the leeward side can be removed as long as the quotient of the inflow velocity of the air flow in the numerator and the exit velocity of the flue gases from the chimney mouth in the denominator is not too great.
  • degree of obstruction denotes the ratio of the surface area of the nozzle jacket, in which the openings for the bypass channels are recessed, to the completely closed surface of this nozzle jacket, in percent, the completely closed nozzle jacket having a degree of obstruction of 100%.
  • the invention has for its object to improve the acid protection in an industrial chimney of the construction described above, and to make it largely independent of the quotient of the inflow velocity of the air flow in the meter and the exit velocity of the flue gases from the chimney mouth.
  • the invention teaches that the acid protection device has a plurality of air guide plates extending in the chimney direction, the width of which is smaller than corresponds to the outer radius of the chimney head, and that the air guide plates are arranged at a gap from one another.
  • the air baffle plates have a width that is smaller than the radius of the chimney head.
  • the air baffles are curved following the curvature of the chimney head and the gap distance is dimensioned such that the entire surface of all air baffles in relation to a corresponding acid protection device with a closed surface is considerably removed from 100%, thereby avoiding that the flue gas against the Chimney head (3) is pulled.
  • they are also all regularly and equidistantly arranged around the chimney head.
  • the invention is based on the knowledge that the aerodynamic acid protection described at the outset is considerably improved and on the quotient of the inflow speed of the air flow in the meter and the exit speed of the flue gases from the chimney outlet in
  • the denominator can be made largely independent if one does not work with a nozzle jacket that is completely closed and whose function is therefore determined by Bernoulli's relationship. It is more advantageous, following the teaching of the invention, to additionally introduce kinetic energy from the inflowing air flow into the annular space, which is opened accordingly, so that the degree of obstruction defined at the outset is considerably removed from 100%. At the same time, corresponding outlet slots are created with the gap distances.
  • a preferred embodiment of the invention is characterized in that the guide plates are designed in accordance with a degree of obstruction of 60% and are arranged equidistantly.
  • the air baffle plates will be closed with the chimney outlet.
  • the annular space of the acid protection device can be closed at the top and / or at the bottom.
  • the acid protection device is preferably used where the industrial chimney has no cover.
  • the air guide plates are designed as glass panes.
  • they can be designed as safety glass panes.
  • Such air baffles in turn are completely corrosion-resistant and require little maintenance. You can be set up so that they can withstand all stresses occurring without difficulty.
  • a preferred embodiment is characterized in that the air baffle plates are designed as safety glass panes.
  • the air baffles can be connected to the chimney head in different ways.
  • the assembly means known from similar structures can be used (cf. DE 40 18 917 A1).
  • the industrial chimney 1 shown in the figures has a chimney mouth 2 which is arranged sufficiently far above the ground in a free-flow area.
  • the basic structure includes a chimney head 3, to which an acid protection device 4 is attached. This is arranged with an annular space-forming distance 5 from the chimney shell.
  • the acid protection device 4 has a length in the chimney direction which corresponds to a multiple of the diameter of the chimney head 3.
  • the acid protection device 4 has a plurality of air guide plates 6 extending in the chimney direction, the width of which is smaller than the outer diameter of the chimney head 3, the air guide plates 6 being arranged at a gap 7 from one another are.
  • the air guide plates 6 have a width that is smaller than the radius of the chimney head 3.
  • the air guide plates 6 are curved following the curvature of the chimney head 3.
  • the air guide plates 6 are designed in accordance with a degree of obstruction of 60% and are arranged equidistantly.
  • degree of blockage has been defined above. Particularly good results can be achieved if nine air baffle plates are arranged equidistantly.
  • Fig. 1 it can be seen that the air guide plates 6 terminate approximately with the chimney mouth 2.
  • the annular space can be closed off at least at the upper end by an annular disk 8.
  • the air guide plates 6 may be designed as glass panes, preferably made of safety glass and laminated safety glass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chimneys And Flues (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (10)

  1. Cheminée industrielle, dont l'embouchure (2) est disposée dans la zone de circulation libre au-dessus du sol, comportant
    une tête de cheminée (3), à laquelle est fixé un dispositif (4) de protection contre l'acide, qui est disposé à une distance (5) de l'enveloppe de la cheminée, qui définit un espace annulaire, et
    dans laquelle le dispositif (4) de protection contre l'acide possède une longueur, comptée dans la direction de la cheminée, qui correspond à un multiple du diamètre de la tête de cheminée (3),
    caractérisée en ce que le dispositif (4) de protection contre l'acide possède une multiplicité de plaques (6) de guidage de l'air, qui s'étendent dans la direction de la cheminée et qui sont cintrées de manière à suivre la courbure de la tête de cheminée (3), et dont la largeur est inférieure à ce qui correspond au rayon extérieur de la tête de cheminée (3), et que les plaques (6) de guidage de l'air sont disposées à une distance de séparation réciproque (7), la distance de séparation (7) étant dimensionnée de telle sorte que le rapport de la surface totale de toutes les plaques (6) de guidage de l'air à la surface d'un dispositif correspondant (4) de protection contre l'acide pourvu d'une surface fermée est nettement différent de 100%, ce qui évite que le gaz de fumée soit attiré vers la tête de cheminée (3).
  2. Cheminée industrielle selon la revendication 1, caractérisée en ce que les plaques (6) de guidage de l'air sont agencées sur la base d'un degré de blocage à 60% et sont équidistantes.
  3. Cheminée industrielle selon l'une des revendications 1 ou 2, caractérisée en ce que les neuf plaques (6) de guidage de l'air sont équidistantes.
  4. Cheminée industrielle selon l'une des revendications 1 à 3, caractérisée en ce que les plaques (6) de guidage de l'air se terminent approximativement au niveau de l'embouchure (2) de la cheminée.
  5. Cheminée industrielle selon l'une des revendications 1 à 4, caractérisée en ce que l'espace annulaire (5) du dispositif (4) de protection contre l'acide est fermé au moins au niveau du bord supérieur.
  6. Cheminée industrielle selon l'une des revendications 1 à 5, caractérisée en ce que les plaques (6) de guidage de l'air sont réalisées sous la forme de plaques de verre.
  7. Cheminée industrielle selon l'une des revendications 1 à 6, caractérisée en ce que les plaques (6) de guidage de l'air sont réalisées sous la forme de plaques en verre de sécurité.
  8. Cheminée industrielle selon l'une des revendications 1 à 7, caractérisée en ce que les plaques (6) de guidage de l'air sont réalisées sous la forme de plaques en verre de sécurité feuilleté.
  9. Cheminée industrielle selon l'une des revendications 1 à 8, caractérisée en ce qu'aux plaques (6) de guidage de l'air se raccordent, côté supérieur et/ou côté inférieur, des plaques de recouvrement, qui sont guidées, avec un rétrécissement radial, en direction de l'enveloppe de la cheminée et sont raccordées à cette enveloppe.
  10. Cheminée industrielle selon la revendication 9, caractérisée en ce que les plaques de recouvrement comportent, côté supérieur et/ou côté inférieur, des ouvertures de circulation.
EP93104312A 1992-04-07 1993-03-17 Cheminée industrielle avec dispositif de protection contre l'acide Expired - Lifetime EP0565886B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4211698A DE4211698A1 (de) 1992-04-07 1992-04-07 Industrieschornstein mit Säureschutzeinrichtung
DE4211698 1992-04-07

Publications (2)

Publication Number Publication Date
EP0565886A1 EP0565886A1 (fr) 1993-10-20
EP0565886B1 true EP0565886B1 (fr) 1996-12-18

Family

ID=6456325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104312A Expired - Lifetime EP0565886B1 (fr) 1992-04-07 1993-03-17 Cheminée industrielle avec dispositif de protection contre l'acide

Country Status (4)

Country Link
EP (1) EP0565886B1 (fr)
AT (1) ATE146584T1 (fr)
DE (2) DE4211698A1 (fr)
DK (1) DK0565886T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792062B1 (fr) * 1999-04-06 2001-12-21 Cie Tech Des Petroles Agencement pour la dissipation des fumees autour d'une cheminee et cheminee equipee d'un tel agencement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1193912A (fr) * 1959-11-05
US2627219A (en) * 1950-01-31 1953-02-03 Air Devices Inc Air exhauster
FR2227496A1 (en) * 1973-04-27 1974-11-22 Larroque Andre Chimney cowl bolted to top of chimney - has concentric rings of vert. baffles below cover plate bolted in place
DE4018917A1 (de) * 1990-06-13 1991-12-19 Flachglas Consult Gmbh Industrie-schornstein mit saeureschutzeinrichtung

Also Published As

Publication number Publication date
DE59304781D1 (de) 1997-01-30
ATE146584T1 (de) 1997-01-15
EP0565886A1 (fr) 1993-10-20
DK0565886T3 (da) 1997-01-06
DE4211698A1 (de) 1993-10-14

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